A stack-based buffer overflow vulnerability exists in the tmUnblock.cgi endpoint of the Linksys WRT120N wireless router. The vulnerability is triggered by sending a specially crafted HTTP POST request with an overly long TM_Block_URL parameter to the endpoint. By exploiting this flaw, an unauthenticated remote attacker can overwrite memory in a controlled manner, enabling them to temporarily reset the administrator password of the device to a blank value. This grants unauthorized access to the router’s web management interface without requiring valid credentials.
History

Thu, 31 Jul 2025 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Linksys
Linksys wrt120n
Vendors & Products Linksys
Linksys wrt120n

Thu, 31 Jul 2025 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 31 Jul 2025 15:15:00 +0000

Type Values Removed Values Added
Description A stack-based buffer overflow vulnerability exists in the tmUnblock.cgi endpoint of the Linksys WRT120N wireless router. The vulnerability is triggered by sending a specially crafted HTTP POST request with an overly long TM_Block_URL parameter to the endpoint. By exploiting this flaw, an unauthenticated remote attacker can overwrite memory in a controlled manner, enabling them to temporarily reset the administrator password of the device to a blank value. This grants unauthorized access to the router’s web management interface without requiring valid credentials.
Title Linksys WRT120N tmUnblock.cgi Stack-Based Buffer Overflow Admin Password Reset
Weaknesses CWE-121
References
Metrics cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2025-07-31T14:57:59.666Z

Updated: 2025-07-31T17:58:15.493Z

Reserved: 2025-07-30T14:54:06.838Z

Link: CVE-2014-125122

cve-icon Vulnrichment

Updated: 2025-07-31T17:58:06.182Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-07-31T15:15:34.620

Modified: 2025-07-31T18:42:37.870

Link: CVE-2014-125122

cve-icon Redhat

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